/*
 * Created on 1 Nov 2006
 * Created by Paul Gardner
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

package com.aelitis.azureus.core.networkmanager.admin.impl;

import java.net.InetAddress;

import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.core3.util.SystemTime;

import com.aelitis.azureus.core.networkmanager.admin.NetworkAdminNATDevice;
import com.aelitis.azureus.plugins.upnp.UPnPPluginService;

public class NetworkAdminNATDeviceImpl implements NetworkAdminNATDevice {
    private UPnPPluginService service;
    private InetAddress external_address;
    private long address_time;

    protected NetworkAdminNATDeviceImpl(UPnPPluginService _service) {
        service = _service;
    }

    public String getName() {
        return (service.getName());
    }

    public InetAddress getAddress() {
        try {

            return (InetAddress.getByName(service.getAddress()));

        } catch (Throwable e) {

            Debug.printStackTrace(e);

            return (null);
        }
    }

    public int getPort() {
        return (service.getPort());
    }

    public InetAddress getExternalAddress() {
        long now = SystemTime.getCurrentTime();

        if (external_address != null && now > address_time && now - address_time < 60 * 1000) {

            return (external_address);
        }

        try {
            external_address = InetAddress.getByName(service.getExternalAddress());

            address_time = now;

        } catch (Throwable e) {

            Debug.printStackTrace(e);
        }

        return (external_address);
    }

    protected boolean sameAs(NetworkAdminNATDeviceImpl other) {
        if (!getAddress().equals(other.getAddress()) || getPort() != other.getPort()) {

            return (false);
        }

        InetAddress e1 = getExternalAddress();
        InetAddress e2 = other.getExternalAddress();

        if (e1 == null && e2 == null) {

            return (true);
        }
        if (e1 == null || e2 == null) {

            return (false);
        }

        return (e1.equals(e2));
    }

    public String getString() {
        String res = getName();

        res += ": address=" + service.getAddress() + ":" + service.getPort();

        InetAddress ext = getExternalAddress();

        if (ext == null) {

            res += ", no public address available";
        } else {

            res += ", public address=" + ext.getHostAddress();
        }

        return (res);
    }
}
